TV See Darren Criss as Music Meister in The Flash-Supergirl musical crossover first look By Natalie Abrams Natalie Abrams Senior Writer EW's editorial guidelines Published on March 7, 2017 12:30PM EST Photo: Jack Rowand/The CW Meet your Music Meister! During the upcoming Flash–Supergirl musical crossover, Darren Criss makes his debut as the DC Comics villain who causes his victims to break out into song — and EW has the first look. After being whammied by the Music Meister, Kara (Melissa Benoist) and Barry (Grant Gustin) find themselves trapped in an alternate reality in which life is like a movie musical. The only way to wake up? Follow the Meister’s script till the end. Kara and Barry’s friends are all characters within the movie, hence Winn (Jeremy Jordan) tickling the keys during a group number — which we reveal in this week’s issue of Entertainment Weekly. Here are more photos: Jack Rowand/The CW Jack Rowand/The CW Jack Rowand/The CW Jack Rowand/The CW Jack Rowand/The CW Jack Rowand/The CW Jack Rowand/The CW Pick up this week’s issue of EW for more scoop on the highly anticipated musical crossover, which will kick off at the end of Supergirl‘s March 20 hour, with the majority of the action taking place during The Flash‘s March 21 episode, both airing at 8 p.m. ET on The CW.